I used to work in a church office. I’d run ministry meetings, organize volunteers, print the bulletin, and do the 1,000 other things that came up. Sometimes I’d poke through Christian catalogues and stumble upon the July 4th bulletin collection.
Imagine a billowing, majestic American flag with the sun streaming into it from the top right. Now, arrange a looming cross in front of it like a lunar eclipse, and you’ve got yourself a symbol of Christian nationalism for whole family of God. 
The message was something like this: Jesus supports America. We might add a footnote: America now has nuclear weapons and God on its side, so watch out world.
Mixing religion with a nation and its politics, whether conservative or liberal, is called syncretism.
Syncretism is defined as:
“the attempted reconciliation or union of different or opposing principles, practices, or parties, as in philosophy or religion.”
What Does It Look Like?
While everyone should support the laws and politicians that best jive with their values and beliefs, syncretism with politics and Christianity typically mixes the priorities of America with those of Jesus. The trick is that Christians can support legislation from a religious standpoint and not commit syncretism.
Confused yet?
Here’s where the main difference occurs: Who is leading us? Is God and the Kingdom leading you? Or is it a politician or political party? If a politician is leading you and Jesus is just tagging along, then there’s no telling what kind of nasty things a politician, whether liberal or conservative, will ask him to do.
Conservatives and liberals both ask things such as “Approve this war please Jesus?”
American Jesus replies, “Oh, of course you can America. America’s safety is way more important than my naive ‘love your enemies’ command.”
However, if Jesus is leading us, we can still use politics as a tool at times. Government has a function among us to maintain order, even if we can debate the size and role of that government when it comes to particulars. Therefore, if we want to combat human trafficking, there is a place for legislation that assures human rights.
At the same time, that does not rule out the place of personal and communal responsibility for us. I know that some liberals can fall into the trap of thinking that voting for a Democrat is the end of their social justice obligations. It’s one I’ve made and have struggled to correct.
If we do get into the political game, we can lose ourselves quickly to the sway of Christian syncretism when politics promises to solve our problems and to usher in all of the good things we desire. We just need to sign ourselves up as foot soldiers for a political party to reap the benefits.
Once we associate Jesus with a nation and a particular political party in that nation, we shrink the Kingdom of God. The whole earth is the Lord’s. He does not share his glory and power with any person or nation.
Political syncretism demands that we mix the priorities of a nation or political party with those of God’s Kingdom. The Beatitudes shared during the Sermon on the Mount make for a lousy political platform.
Jesus said: Blessed are the meek, for they will inherit the earth.
Politics says: Blessed are the fighters and aggressors…
Jesus said: Blessed are the merciful, for they will be shown mercy.
Politics says: Blessed are those who respond in kind…
Jesus said: Blessed are the peacemakers, for they will be called sons of God.
Politics says: Blessed are the strong and proactive who take preemptive action…
Politics are not evil in and of themselves. They can be used for good in some circumstances as one tool among many at our disposal. However, politics and national priorities cannot be mixed with God’s Kingdom. The notion of a Christian nation is absurd in that no nation would ever consistently embody the ways of God’s Kingdom.
Christianity can influence and impact a nation via the Kingdom’s bottom-up agenda. We should want more Christians in America because more Christians will influence our nation to embody the values of the Kingdom.
However, once we join the priorities of the Kingdom with those of a nation, the Kingdom of God will lose every time. Having a cheesy, patriotic bulletin will be the least of our worries then.